Cutter-head.



C. LUTZE.

CUTTER HEAD.

APPLICATION FILED MAY 25. 19x5.

1,162,792, 7 Patented Dec. 7, 1915.

3 SHEETS-SHEET I.

A TTOR/VE Y c. LUTZE. CUTTER HEAD.

APPLICATION FILED MAY 25. I915.

1,162,?92. Patented Dec. 7, 1915.

3 SHEETSSHEET 3.

V hq.

Fly. 10.

I 9, 13: INVENTOR Gm! [u/z e By Kara/z fay/z HIS A TTOR/VE Y CARL term, or new YORK, 1a; ir.

Curran-HEAD.

specification of Letters Pateht. Patented Der}. "Z, 1915.

Application filed May 25, 1915.. v..t.-aa'11e. 30290. i

To all whom itmag c0nccrn:-- v v Be it known that I, CARLLUTZE, asubject of the Emperor of Germany, and a resident of New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Cutter-Heads, of which the following is a sp eci fication. v g

This invention relates to improvements in power driven, wood Working mechanisms,in which one or more knives are rotated at a high speed by means of a vertical spindle, adjustable with reference to;a work table, the knife being held in what is commonly termed a cutter head. g

The object of the invention is to provide a cutter head of the class mentioned, having means for securing the knives or cutters rigidly in preferred adjustment, angularly with respect to their cutting edge and the radial distance from the axial center of rotation.

Another object is to provide means where by a combination of knives can be usedin the same holder, each independently ustable with respect to radial extension, and all so held as to preclude the possibility of movement in the cutter head,vas by contact with the Work or centrifugal force, and.

finally to provide a cutterhead which may be cheaply constructed,accurately balanced.

and easily operated. 7

These objects are attained by the novel construction and arrangements of parts hereinafter described and shown in the .ac-

companying drawings, forming part of this.

specification, and in which I H Figure 1 1s a perspective vlew of a cutter head, made in accordancewith the invention and illustrating its application. Flg. 2 1s a vertical sectionalvlew of the. head showlng the interior arrangement. Fig. 3 is abottom plan view of the upperclamp element. Fig. l is a top plan view of the lower clamp element, a knife and. holder being shown in position. Fig. 5 is a fragmental transverse sectional view, taken on line 5-5 of Fig. 4. Fig. 6 is a fractional sectional view, taken on line 66 of Fig. 4. Fig. 7 is a collective view showing a single form of knife and indicating the different angles at which it can be operatively held. Fig. 8 shows respectively plan and side views of another form of knife arranged in series. Fig. 9 presents similar views of a different form of knife, arranged in pairs. Fig. 10 is a sectional elevational view of a composite knife, Fig. 11

isanend view ofone section of a form of knife holder sleeve. Fig. 12 is a side view ofthe same, and, Fig. 13 is a perspective view of a knifeholding block. i

In machines ofthe kind described it is usualfto havea work supporting surface or table l5, of solid nature, through which eX- tends' a vertical spindle 1.6, driven by a pulley 17 below thesurface, the work thereon ordinarily inthe form of wood strip being gulded. in its passage past the cutter head by suitable devices engaging with slots formed longitudinally in the table,or by guides adjustable on its surface, the spindle being vertically adjustable with reference to the table surface A collar 18 is rigidly secured to thespindle 16, and partially embedded in it is a pin key 19,driving the lower knife holding element 20 of the cutter head which rests upon the upper surface of the collar 18. The upper or' clamp element 21 of the cutter head may be firmly pressed against the lower by means of the clamp nut 22 and washer 23.. In each of these elements, on opposite these cavities 26, is formed tangentially, for

use if it be desired to insert knives in that manner; other openings 27 and a single opening 28 are radial and differ only in size, their counterparts being formed on opposite sides of the head in order to assist in maintaining a balance. On the side opposite to the larger cavity is an opening 29, the longitudinal section of which is in the form of a truncated cone having a radial axis with the base toward the interior. shape is a frusto-conical sleeveBO comprised of-a. pair of elements having roughened or corrugated conical surfaces 31 to engage with the opening without slipping or displacement and having formed between them a circular opening 32, eccentric with the eX- terior and also having its axis at an angle divergent from that of the cone. The in- Suited to this terior of this opening is corrugated longir tudinally and adapted to receive a knife shank and its holders 33, which, like the others, are parallel blocks having curved exteriors and flat faces engageable on each side of the knife shanks 34., both the shanks and faces being corrugated transversely in order to engage and hold with the requisite rigidity when under pressure through the clampinut' 22. Thus it will be seen that-the knives '35'can readily be adjusted as to the 7 distance they are I to project out" beyond the cutter head anda'lso as to the cutting angle construction.

turning the knives upon'the longitudinal axis of their shanks" 341a wide range of shapes may be produced by a single k nife,'a feature not possible with heads of ordinary vIn Figs. 8 and 9 itmay be' seen that the cutter ismade up of a plur'ality of knives 36 and 38, held in the same holder, by their shanks 37 and 39 and obviously blanks or other forms of knives be interposed between them or i so combined as to produce required results," as shown in Fig. 10. It is also possible to use a counterbalancing blank in the opening opposite the knife or introduce'an'other knife whereby other reangularly, in fact in P Vi r y.possible' direction and also prov de an'efficient clamping means sults may be attained" Furthermore the peculiar conical sleeve 30per1ni tsjthe knife to'bc adjusted vertically; horizontally and for it. In adjusting or changing the knives,

the nut 22 isloos'ened in order to manipulate the holders, the upper element: being: raised as'it is released by meansjof the spring 40,

the holders turned on their axis,1as maybe desired, the knife put in place and the nut again'app'lie'd. 7

The operation from the foregoing by those familiar with the" art and it will be'obvious that a wide range of molding shapes can beproduced with a limited number of cutting knives.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is 7 1 In a cutter head, a pair of clamp elements having recessed cavities'of circular cross'section in their adjacent faces, seg- Copi es of this patent maybe obtained for mental blocks suited to the mentioned cavities, said blocks being arranged in pairs and corrugated longitudinally upon the exteriors and transversely upon their adjacent faces, knives having corrugated shanks engaged With the faces of said blocks, and means for securing said knives between said clamp elements.

2. In a cutter head, a pair of cylindrical elements having'a plurality of semi-circular depressions formed equally in each, the depressions being of varying area and differently disposed, means for clamping said elements, segmental blocks disposed in pairs in the mentioned depressions and spaced apart therein, one or more knives engageablc between said blocks in the mentioned depression, and means combined with said blocks and said knives whereby the latter are positively held in an adjusted position.

3. In a cutter head having a pair of separable cylindrical clamp elements and formed with one or more frusto-conical depressions equally in each, a conic sectional sleeve engaged in the depressions, said sleeve having a cylindrical passage eccentrically formed therethrough, a knife, means for positively engaging said knife in the mentioned passage, and means for clamping said knife in an adjusted position.

4.111 a' cutter head having a pair of separable cylindrical clamp elements and formed with one or more frusto-conical depressions equally in each, a conic sectional sleeve engaged in the depressions, said sleeve havinga cylindrical passage formed therethrough in a diiferent axial plane to that of the sleeve, one or more knives having shanks suited to the mentioned passage and means forclamping said knives in an adjusted position therein.

5. In a cutter head having a sectional clamp element and formed with one or more frusto-conical' depressions equally in each 1 d v e section, a conic sectional sleeve rotatably en- Will be readily understood gaged in the depressions, knives positively engaged insaid sleeve, and means combined with said sleeve whereby said knives may be adjusted relative to its axis.

Signed at New York, in the county of New York and State of New York, this 15th day ofMay, A. D. 1915.

CARL LUTZE.

Witnesses:

IRA H. GARLIGK, Enron GOESTL.

five cents each, byaddressing the Commissioner of Patents Washington, D. 0'. 

